Methyl α‐diazo‐4‐methoxy‐β‐oxo‐benzenepropanoate

[1198573-66-8] C11H10N2O4 (MW 234.21) InChI = 1S/C11H10N2O4/c1-16-8-5-3-7(4-6-8)10(14)9(13-12)11(15)17-2/h3-6H,1-2H3 InChIKey = VNNIUPQLCJJRGZ-UHFFFAOYSA-N (used as a carbene precursor for Rh(II)-catalyzed cyclopropanation of alkenes to form β-keto-cyclopropanecarboxylates, and for the formation of 2-aminofurans via a carbenoid-mediated formal [3+2] cycloaddition with enamines) Alternative Name: none. Physical Data: yellow oil. Solubility: soluble in most organic solvents. Form Supplied in: not commercially available. Purification: silica gel chromatography, using 25% EtOAc in hexane as eluent. Handling, Storage, and Precautions: potentially explosive compound. The title compound should be stored neat at −20 °C, at which temperature it is stable for at least 12 months.